Facebook and Google dominate list of most popular apps (again)

The eight most popular mobile apps in the United States are made by two tech giants. Facebook and Google dominated the app market in 2017 and continued a duopoly that's existed for years.

Apple, Amazon and Snapchat are in the best positions to upend the Facebook-Google duopoly. Apple Music claimed the ninth spot on Nielsen's rankings with 68.4 million users. Amazon rounded out the top 10 with 65.5 million users, along with a 43 percent year-over-year growth rate, according to Nielsen.